don steward
mathematics teaching 10 ~ 16

Thursday, 8 September 2011

triangular numbers squared

the fact that a triangular number (Tn) of triangular numbers (Tn) is the sum of the first n cubes
can be tested numerically

a form of diagram for this result can be quite hard to generalise (for me anyway)

the result is also shown with this slightly easier to appreciate (as a generality) diagram:

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